arduino:unofaq
Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
|
arduino:unofaq [2010/09/28 18:59] ladyada |
arduino:unofaq [2010/09/28 19:54] ladyada |
||
|---|---|---|---|
| Line 100: | Line 100: | ||
| - Having the chip act only as a USB/serial passthrough simplifies the firmware so that the chip has only one function instead of having to have it do double duty as programmer -and- serial interface (think about it, its not easy) | - Having the chip act only as a USB/serial passthrough simplifies the firmware so that the chip has only one function instead of having to have it do double duty as programmer -and- serial interface (think about it, its not easy) | ||
| - Backwards compatibility - the Arduino chips can still be programmed with FTDI breakout boards or cables, making it easy for people to breadboard or make clones. | - Backwards compatibility - the Arduino chips can still be programmed with FTDI breakout boards or cables, making it easy for people to breadboard or make clones. | ||
| + | |||
| + | ====== How does the new '8u2 affect Arduino-derivatives? ====== | ||
| + | |||
| + | Every USB device needs to have a unique product id and vendor id. Vendor IDs (VID) are sold to companies and Product IDs (PID) are chosen by that company. So for example FTDI owns VID #0403 and they give their chips ID's between #0000 and #FFFF (65,536 different PIDs) Older Ardiuno's used FTDI's VID/PID as that is part of the deal when you purchase their chips. Because the Uno does not use an FTDI chip anymore, the Arduino team had to purchase a USB Vendor ID (VID). Every Arduino product will now have their own PID starting with the Uno (#0001) | ||
| + | |||
| + | If you want to make your own Arduino-compatible board, you have a few choices: | ||
| + | |||
| + | - Don't use an 8u2, go with an FTDI chip instead that comes with a VID | ||
| + | - If you're planning to make more than one board for your personal use, you will have to [[http://www.usb.org/developers/vendor/|purchase a VID from USB IF]] for a one time $2000 fee | ||
| + | - If you're making a single board for your own experimentation, you can pick a VID/PID that doesn't interfere with any devices on your computer and substitute those in | ||
| + | - You can purchase licenses for single VID/PID pairs from companies that develop USB devices (we dont have any specific links at the moment) | ||
| + | |||
| + | However, you can't use the Arduino VID when distributing your own Arduino-compatibles! If the cost of a VID is too much for you, simply go with an FTDI chip, 'K? | ||
| ====== Are Shields still going to work? ====== | ====== Are Shields still going to work? ====== | ||
| Line 124: | Line 137: | ||
| Yes! The Uno is still available under a Creative commons license. [[http://arduino.cc/en/Main/ArduinoBoardUno|You can get the latest schematics and layouts over at the Arduino website.]] | Yes! The Uno is still available under a Creative commons license. [[http://arduino.cc/en/Main/ArduinoBoardUno|You can get the latest schematics and layouts over at the Arduino website.]] | ||
| + | |||
| + | |||
| + | |||
/home/ladyada/public_html/wiki/data/pages/arduino/unofaq.txt · Last modified: 2016/01/28 18:05 (external edit)
Page Tools
Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Share Alike 4.0 International
